Which of the following choices is the standard deviation of the sample shown
here?
19, 20, 21, 22, 23

Α. 2.5
Β. 21
C.2
D. square root 2
Ε.Square root 2.5

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!

there is no picture in order for this question to be answered

i believe a. 12x≥120 is the answer

i would think "anyone would want the best for their child" is correct